X = int(input())

if X >= 400 and 599 >= X:
  print("8")
elif X >= 600 and 799 >= X:
  print("7")
elif X >= 800 and 999 >= X:
  print("6")
elif X >= 1000 and 1199 >= X:
  print("5")
elif X >= 1200 and 1399 >= X:
  print("4")
elif X >= 1400 and 1599 >= X:
  print("3")
elif X >= 1600 and 1799 >= X:
  print("2")
elif X >= 1800 and 1999 >= X:
  print("1") X = int(input()) X int(input()) int input() input if X >= 400 and 599 >= X:
  print("8")
elif X >= 600 and 799 >= X:
  print("7")
elif X >= 800 and 999 >= X:
  print("6")
elif X >= 1000 and 1199 >= X:
  print("5")
elif X >= 1200 and 1399 >= X:
  print("4")
elif X >= 1400 and 1599 >= X:
  print("3")
elif X >= 1600 and 1799 >= X:
  print("2")
elif X >= 1800 and 1999 >= X:
  print("1") X >= 400 and 599 >= X X >= 400 X 400 599 >= X 599 X print("8") print "8" elif X >= 600 and 799 >= X:
  print("7") X >= 600 and 799 >= X X >= 600 X 600 799 >= X 799 X print("7") print "7" elif X >= 800 and 999 >= X:
  print("6") X >= 800 and 999 >= X X >= 800 X 800 999 >= X 999 X print("6") print "6" elif X >= 1000 and 1199 >= X:
  print("5") X >= 1000 and 1199 >= X X >= 1000 X 1000 1199 >= X 1199 X print("5") print "5" elif X >= 1200 and 1399 >= X:
  print("4") X >= 1200 and 1399 >= X X >= 1200 X 1200 1399 >= X 1399 X print("4") print "4" elif X >= 1400 and 1599 >= X:
  print("3") X >= 1400 and 1599 >= X X >= 1400 X 1400 1599 >= X 1599 X print("3") print "3" elif X >= 1600 and 1799 >= X:
  print("2") X >= 1600 and 1799 >= X X >= 1600 X 1600 1799 >= X 1799 X print("2") print "2" elif X >= 1800 and 1999 >= X:
  print("1") X >= 1800 and 1999 >= X X >= 1800 X 1800 1999 >= X 1999 X print("1") print "1" X = int(input()) int(input()) X
X = int(input())

if X >= 400 and 599 >= X:
  print("8")
elif X >= 600 and 799 >= X:
  print("7")
elif X >= 800 and 999 >= X:
  print("6")
elif X >= 1000 and 1199 >= X:
  print("5")
elif X >= 1200 and 1399 >= X:
  print("4")
elif X >= 1400 and 1599 >= X:
  print("3")
elif X >= 1600 and 1799 >= X:
  print("2")
elif X >= 1800 and 1999 >= X:
  print("1")